Load Line Analysis: Example #2 - A Beta Stabilized Common-Emitter Circuit (066e3)

In the last video I created the D.C. and A.C. Load Lines for a simple Common-Emitter circuit.
In this video I am going to create the D.C. and A.C. Load Lines for a beta-stabilized, Common-Emitter circuit which has a split Emitter resistor.
I've provided links to all of the videos in this series below the time markers.
=============== LINKS =================
LINK to the promised formula sheet:
drive.google.c...
=======================================
Time Markers for Your Convenience
----------------------------
00:05 Introductory Comments
01:29 The Circuit: A Tour
02:35 The Family of Curves for this Example
02:49 The D.C. Load Line
02:50 Kirchhoff's Voltage Equation around the Collector-Emitter Loop
06:00 Plotting the D.C. Load Line - Three Points
06:13 Question #1: Vce=? when Ic=0
06:44 Question #2: Ic=? when Vce = 0?
07:21 Drawing the Line
07:31 Plot the Quiescent Operating Point
08:13 The A.C. Load Line
08:17 Schematic Preparation
08:52 Step #1: Short D.C. Sources
09:06 Step #2: Short all Capacitors
10:17 Step #4: Write KVL around the Collector Loop
14:41 Plotting the Load Line Points
14:46 Question #1: Vce=? when Ic=0?
15:27 Question #2: Ic=? when Vce = 0?
16:12 Draw the Line
16:23 An Observation regarding the A.C. Load Line
16:32 The Gain Conundrum!
17:38 Final Comments and Toodle-Oots
==== This Video Series Links ====
Video#1: Load Line Analysis: Foundations
• Load Line Analysis: Fo...
Video#2: Load Line Analysis: Example #1 - A Simple Common-Emitter Circuit
• Load Line Analysis: Ex...
Video#3: Load Line Analysis: Example #2 - A Beta Stabilized Common-Emitter Circuit
• Load Line Analysis: Ex...
Video#4: Load Line Analysis: Answers to Two Poignant Questions
• Load Line Analysis: An...

[@WECB640]

Keep producing this outstanding content Ralph. There ARE people who have the desire to learn. Many thanks. 73

[@eie_for_you]

Thanks, man! 😀

[@W1RMD]

@@eie_for_you But it's going to take less than $2 in parts to do all of this!

[@eie_for_you]

@@W1RMD🙂

[@W1RMD]

Thanks for giving all of this knowledge. Take care.

[@eie_for_you]

You are very welcome! 🙂

[@andymouse]

Great work....cheers.

[@eie_for_you]

Thank you and you are welcome! 🙂

[@davidluther3955]

HOW DID YOU COME UP WITH THE VALUE FOR THE SWAMPING RESISTOR OR,WHAT RULE OF THUMB DID YOU USE?

[@eie_for_you]

I'm not familiar with the term "swamping resistor," but I assume you are referring to the upper emitter resistor. I start with the standard method of determining the emitter resistor value to establish the DC operating point. This is Re(total). The gain of a common-emitter amplifier with an emitter resistor is *approximately* equal to the collector resistor value divided by the emitter resistor value. So, I say, "I want a gain of 'g' and my collector resistor value is 'Rc', so my un-bypassed emitter resistor value needs to be Re(gain)=Rc/g. This value is smaller than Re(total). So Re(bypassed) = Re(bottom) = Re(total) - Re(gain). Re(gain) becomes the top, un-bypassed emitter resistor. Hope this makes sense. 🙂

[@davidluther3955]

​THANK YOU!ALL THE ACTIVE CIRCIUTS TEXTBOOKS I HAVE CALL IT A SWAMPING RESISTOR,BECAUSE IT IS SUPPOSE TO REDUCE THE BAD EFFECTS OF r'e.